merge(third_party/git): Merge squashed git subtree at v2.23.0

Merge commit '1b593e1ea4' as 'third_party/git'

third_party/git/t/Git-SVN/Utils/fatal.t

@@ -0,0 +1,34 @@
+#!/usr/bin/perl
+
+use strict;
+use warnings;
+
+use Test::More 'no_plan';
+
+BEGIN {
+	# Override exit at BEGIN time before Git::SVN::Utils is loaded
+	# so it will see our local exit later.
+	*CORE::GLOBAL::exit = sub(;$) {
+	return @_ ? CORE::exit($_[0]) : CORE::exit();
+	};
+}
+
+use Git::SVN::Utils qw(fatal);
+
+# fatal()
+{
+	# Capture the exit code and prevent exit.
+	my $exit_status;
+	no warnings 'redefine';
+	local *CORE::GLOBAL::exit = sub { $exit_status = $_[0] || 0 };
+
+	# Trap fatal's message to STDERR
+	my $stderr;
+	close STDERR;
+	ok open STDERR, ">", \$stderr;
+
+	fatal "Some", "Stuff", "Happened";
+
+	is $stderr, "Some Stuff Happened\n";
+	is $exit_status, 1;
+}